[英]c++ mfc csv file read
i have a problem with csv file reading. 我在读取csv文件时遇到问题。 I'm pretty new to mfc and i hope someone can help me.
我对mfc还是很陌生,希望有人能帮助我。 So...i have a button and with it i open file dialog and choose csv file.
所以...我有一个按钮,用它打开文件对话框,然后选择csv文件。 In csv file i have diferent shapes(rectangle,ellipse,pollygon) with color and position info(separtor is ;).
在csv文件中,我具有颜色和位置信息(分隔符为;)的不同形状(矩形,椭圆形,多边形)。 Now i need to show this informations in a ListBox and here i'm stuck.
现在,我需要在ListBox中显示此信息,在这里我被卡住了。 I got so far(code)...and i don't know it's ok and i can't find any good help so i hope someone can give me a hint.
我到现在为止(代码)...我不知道还可以,我找不到任何好的帮助,所以我希望有人能给我提示。
void CDialogDrawing::OnBnClickedButton2()
{
TCHAR filtri[] = _T("CSV files (*.csv)|*.csv||");
CString path;
CFileDialog dlg(TRUE, _T("csv"), _T("*.csv"), OFN_FILEMUSTEXIST | OFN_HIDEREADONLY, filtri);
dlg.m_ofn.lpstrTitle = _T("Open...");
if(dlg.DoModal() == IDOK) //OK
{
path = dlg.GetPathName();
//
CStdioFile readFile;
CFileException fileException;
CString strLine;
if(readFile.Open(path, CFile::modeRead, &fileException))
{
while (readFile.ReadString(strLine));
{
seznamLikov.AddString(strLine);
}
}
else
{
CString strErrorMsg;
strErrorMsg.Format(_T("Can't open file %s , error : %u"), path, fileException.m_cause);
AfxMessageBox(strErrorMsg);
}
readFile.Close();
}
}
Trailing semi-colon after the while
: while
之后的分号:
while (readFile.ReadString(strLine));
{
seznamLikov.AddString(strLine);
}
remove it as it is equivalent to: 删除它,因为它等效于:
while (readFile.ReadString(strLine)) {}
{
seznamLikov.AddString(strLine);
}
meaning AddString()
will be invoked only once, after ReadString()
fails. 意味着
AddString()
在ReadString()
失败后将仅被调用一次。
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